The invention relates to an internal gear pump capable of achieving partition axial compensation. The internal gear pump comprises a pump body, a gear pair and crescent blocks; a gear shaft is meshed with an internal gear ring to form the gear pair; the crescent blocks are arranged in the gear pair; a left axial compensation device and a right axial compensation device which are the same in structure are symmetrically arranged on the two end faces of the crescent blocks and the gear pair; each axial compensation device comprises a first-level side plate, a second-level side plate and a third-level side plate; a first compensation groove is formed in the outer end face of each first-level side plate; a second compensation groove is formed in the inner end face of each first-level side plate; elastic sealing rings and side plate gaskets are sequentially stacked in the first compensation grooves to form a first-level axial compensation system; springs and the second-level side plates are sequentially stacked in the second compensation grooves to form a second-level axial compensation system; sealing blocks and the third-level side plates are sequentially stacked on the second-level side plates to form a third-level axial compensation system. Partition self-adaption adjustment is carried out on abrasion positions and non-abrasion positions, internal leakage of the pump is effectively reduced, and large-area supporting of the side plates can be still achieved under the abrasion state.